Indians bench coach Brad Mills will manage the American League in Tuesday's All-Star Game as his close friend and Cleveland manager Terry Francona remains hospitalised after undergoing a heart procedure.

Francona, 58, underwent a catheter ablation to address an irregular heartbeat, the team said in a statement on Friday.

"Terry is resting comfortably after the cardiac procedure... [and] is expected to make a full recovery," read the release.

According to the statement, Francona is expected to be released from the Cleveland Clinic in the next couple of days and is expected to resume managing the Indians, who lead the AL Central, on July 14.